Quantitative Aptitude - Arithmetic Ability Questions

A bus travels 720 km in 20 hours. Calculate its average speed in meters/second.

A thief is stopped by a policeman from a distance of 450 metres. When the policeman starts the chase, the thief also starts running. Assuming the speed of the thief as 7 km/h and that of policeman as 12 km/h, how far the thief would have run, before he is over­ taken?

A number is greater than five times its reciprocal by 19/2. Find the number.

The reciprocal of the sum of the reciprocals of 8/7 and 5/6 is:

Two trains are running in opposite directions with the same speed. If the length of each train is 486 metres and they cross each other in 27 seconds, then what is the speed (in km/hr) of each train?

The ratio of present ages of P and Q is 5 : 8. Three years later their ages will be in ratio 8 : 11. What is the present age (in years) of Q?

Two cars travel from city A to city B at a speed of 42 and 60 km/hr respectively. If one car takes 2 hours lesser time than the other car for the journey, then the distance between City A and City B is:

A plane flies a distance of 1800 km in 5 hours. What is its average speed in meters/second?